//Example of adding a tabindex to radio fields options in Caldera Forms

cf-tabindex-radio-options.php

<?php
/**
 * Plugin Name: CF tabindex on radio options
 * Autor: New0
 * Description: Add tabindex on options of radio fields in CF
 */

//Example of adding a tabindex to radio fields options in Caldera Forms
// If there are multiple radio fields on same page, target each field using the field ID between caldera-grid and radio classes.
//Like ".caldera-grid #fld_8471527_1-wrap .radio label input" replacing #fld_8471527 by the field ID ( and keeping _1-wrap attached).
add_action( 'wp_footer', function()  {
	echo '<script>
		jQuery(".caldera-grid .radio label input").each(function (i) { jQuery(this).attr("tabindex", i + 1); });
	</script>';
});